On a gentoo Linux system the
dmesg output shows something like the following repeatedly:
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 eth0: Transmit timeout, status 0c 0005 c07f media 10. eth0: Tx queue start entry 18 dirty entry 14. eth0: Tx descriptor 0 is 0008a5ea. eth0: Tx descriptor 1 is 0008a5ea. eth0: Tx descriptor 2 is 0008a5ea. (queue head) eth0: Tx descriptor 3 is 0008a5ea. eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
and the output of
ethtool -S eth0 is
NIC statistics: early_rx: 0 tx_buf_mapped: 0 tx_timeouts: 137 rx_lost_in_ring: 0
However, on an identical system with identical ethernet card and identical Linux and identical kernel there is no such error visible. How to find out the reason for this error message?
Speculation: Could it be some firewall issues, then the Linux system is trying to copy something to a different system? Any other network-related issue?